Sewage sludge electro-dewatering | Request PDF
According to literature, after electro-osmosis dewatering, values of energy consumptions found for types of sludge with an initial DS value lower than 13% are usually under 400 Wh/kg H 2 O. These ...
Coupling electro-dewatering and low …
Sludge electro-dewatering technology utilizes electric energy to drive electro-migration of water molecules10,11. Recently, it was extensively studied7,12,13 and also occupied a …
Numerical Evaluation of Optimal Approaches for Electro-Osmosis Dewatering
Abstract. A newly developed numerical model is used to identify and evaluate optimum electrode configurations for electro-osmosis dewatering, as well as to evaluate approaches such as current ...
The effects of aging for improving wastewater …
The effects of aging for improving wastewater sludge electro-dewatering performances | Semantic Scholar. DOI: 10.1016/J.JIEC.2019.08.049. Corpus ID: …
Effects of temperature variation on wastewater sludge electro-dewatering
Sludge electro-dewatering (SED) is an effective volume reduction method for wastewater sludge before disposal or recycling. ... Compared with another two pictures (Fig. 10 a and b), aromatic proteinⅠsubstance was newly found at Ex/Em of 225–230/305-310 nm (peak C), and tyrosine & protein-like substance was located at Ex/Em of …
In situ generation of H2O2 for Fenton oxidation in …
In-situ generation of H 2 O 2 for enhancing sludge dewatering is proposed.. Sludge dewaterability and filterability are demonstrated by water content, CST and SRF. • Fe 3+ flocculation and ·OH oxidation are responsible for EPS disintegration.. Electro-Fenton process is the effective and inexpensive method for sludge handling.
Permanganate/bisulfite (PM/BS) conditioning–horizontal electro …
1. Introduction. Sludge is a by-product of wastewater treatment and its dewatering is an essential step to make the transportation and disposal of sludge physically and economically feasible (Subramanian et al., 2010, Devlin et al., 2011, Xiao et al., 2016).In China, the dramatic increase in municipal wastewater treatment capacity …
Coupling electro-dewatering and low-temperature air …
When 35 V voltage was applied for sludge electro-dewatering, it can directly reduce the water content to about 55 wt% within 15 min, and then air-drying to 20 wt% water content took about 100 min ...
Sewage sludge electro-dewatering
Electro-dewatering is a process in which low direct current (DC) electric field is applied through the sludge segment to cause an electroosmotic phenomenon that is …
Electro-osmosis dewatering as an energy efficient …
In recent times, there has been a rise in interest on the applications of electro-technology based food processing methods. With drying in food industries being an energy intensive process with huge environmental impacts, the objective of this study was to design and develop a purpose-built laboratory system, for experimentally …
Variations of moisture and organics in activated sludge …
The feasibility of using Fe 0 /S 2 O 8 2− conditioning (zero valence iron (ZVI)/persulfate (ps)) integrated with horizontal electro-dewatering (HED) to improve the dewaterability of activated sludge (AS) was evaluated. The removal and migration of free and bound water in the ZVI/ps–HED process were determined, along with the organic …
Experimental study on the electro-dewatering transport of …
Electro-dewatering transport improved with a higher initial water content or lower initial soil salinity, but was steady when the real-time soil properties changed. An interpretation of the experimental results is presented from the perspective of the electro-dewatering mechanism. The solid–water–ion interaction system of the soil was ...
Sewage Sludge Electro-Dewatering Treatment—A Review
The study was conducted to evaluate the impact of pressure-driven electro-dewatering (EDW) on improving sludge characteristics related to disposal in agriculture, including biological stability, pathogen availability, heavy metals concentrations and nutrients content. ... 225–234. polyelectrolytes. Desalination 2008, 227(1–3), 103–110. ...
(PDF) Identification of Moisture Components of Slurry
Electro-dewatering (EDW) is a hybrid technology for separating liquids from solids in the wastewater sludge dewatering process. EDW has excellent prospects because it is able to remove water from ...
Investigation of the properties and mechanism of
During electro-dewatering, protein-like and tryptophan-like substances are released from the sludge in large quantities, as evidenced by the disappearance of peaks A, B and C in the figure (Fig. 7 II, IV). The peaks appearing in TB-EPS were both associated with humic acid which is an important factor in filtration resistance [49]. Therefore ...
Electro-dewatering of steel industrial sludge
Electro-dewatering (EDW) is regarded as one of the most efficient and cost-effective technical solutions for sludge deep dewatering [8]. The solid surface of sludge is commonly negatively charged, surrounded by a layer of liquid with opposite charges for charge neutralization, which causes the sludge system to form a double electric layer.
Advances and challenges of electrokinetic dewatering of
Jajuee et al. [70] patented a continuous electrokinetic process for dewatering oil-sand tailings, which consisted of an auger and perforated tube.The auger shaft and the tube served as the anode and cathode, respectively. Laboratory-scale experiments performed on a 2.54 cm diameter tube with an electric field of 40 V/cm demonstrated …
Electro-dewatering of wastewater sludge: influence of the …
Electric field-assisted dewatering, also called electro-dewatering (EDW), is a technology in which a conventional dewatering mechanism such a pressure dewatering is combined with electrokinetic effects to realize an improved liquid/solids separation, to increase the final dry solids content and to accelerate the dewatering process with low energy …
Sewage sludge electro-dewatering
2020, Pages 163-225. ... The impact of pH on electro-dewatering was related to the surface charge of the particles measured as zeta-potential. One of the differences between electro-dewatering and mechanical dewatering technologies is that electro-dewatering actively removes ionic compounds from the sludge. In this study, dissolution and ...
(PDF) Electro-dewatering (EDW) as Hybrid Dewatering …
Electro-dewatering of sewage sludge with pulsating direct current (PDC-dewatering) was conducted to investigate the effects of pulsating frequency (0.01-60 Hz) and duty cycle (DTC) (20-) on ...
Electro-dewatering of sludge under pressure and non
Electro-dewatering (EDW) is an emerging dewatering method which is capable of increasing the dry solid content of sludge up to 70 wt% [10], and it has been recommended as a substitute [10] [11 ...
Electro-Osmotic Dewatering (EOD) of Bio-Materials
The effects of these electric field applications and the electrode arrangements and configurations on the dewatering processes are shown, and the usage of electro-osmotic dewatering is focused to biomaterials such as sewage/activated sludge, waterworks sludge, food processing products and wastes, and biomass sludge. …
Correlation and mechanism of extracellular polymeric
Electro-dewatering (ED) is an attractive technology for enhancing dewaterability of waste activated sludge (WAS), and the distribution and composition of EPS and secondary structure of extracellular protein in sludge has a great influence on the sludge dewaterability. Therefore, in order to optimize and regulate sludge ED process, it is ...
Sewage Sludge Electro-Dewatering Treatment—A Review
However, prediction of dewatering enhancement for sewage sludge, in particular, offers a challenge due to variations in sludge pretreatment practices and the lack of harmonized testing methodologies. In this review article, the aspects that have an effect on sewage sludge electro-dewatering and its feasibility are discussed in the light of ...
Electroosmotically Enhanced Sludge Pressure Filtration
Electroosmosis, the movement of water in the influence of a direct‐current (dc) electric field, has been used since the 1930s to dewater soil for construction …
Electro-Osmotic Dewatering with Polarity Reversals
An increasing body of evidence (1,4,5) suggests that reversal of electrode polarity or current direction during electro-osmosis leads to improved consolidation and more efficient dewatering. This note reviews the evidence and presents results of recent laboratory tests bearing directly on this question.
Electro-kinetic dewatering of oily sludges
Electro-kinetic dewatering was very effective in reducing the weight of the protein-rich sludge. In our bench-scale experiments, using two vertical electrodes, more than half the water content could be removed with a sufficient electrical field, i.e. 20 V at an electrode spacing of 4 cm. While further increase in the electric field to 30 V ...
Electro-dewatering of wastewater sludge: Influence of the …
Electro-dewatering (EDW) is an efficient and energy-saving technology for deep dewatering of sludge. It is significantly influenced by the physicochemical properties (e.g., conductivity, pH and zeta potential) of sludge, which can be altered by conditioning. In this study, sludge conditioning by microbial fuel cell (MFC) was innovatively ...
Carbon-based materials reinforced waste activated sludge electro
Electro-dewatering (ED) is an attractive technology for enhancing dewaterability and improving the sustainability of waste activated sludge (WAS) handling. However, electrically assisted mechanical dewatering processes consume more energy and the extracellular polymeric substance (EPS) dissolution caused by electrochemical …
Cationic polyacrylamide (CPAM) enhanced pressurized vertical electro
Electro-dewatering process, a promising and fascinating approach to intensify mechanical dewatering, has attracted considerable attention ... On the basis of PARAFAC analysis, four fluorescence components were identified at Ex/Em of 225–245/330–350 (peak A), 280/340 (peak B), 280/420 (peak C), and 360/440 (peak D) ...
